Nozzle for lubricating guns and pumps



April 2s, 193:. H. 'KREI'DEL' A 1,855,803

NOZZLE FOR LUBRICATING GUNS AND PUIPS Filed Ju 7. 1929 Patented Apr. 26,1932 HANS KREIDEL, F WIESBADEN, GERMANY NOZZLE FOB, LUBRICATING GUNS AND PUNPS Application led J'une '1,l 1929, Serial No. 369,162, and inGermany November 1, 1928.

The present invention relates to a nozzle cating pump with a packingmember fitted into its enlarged outlet passage, adapted to.

engage with a. rounded lubricating nipple head rovided with a non-returnvalve, and provides further that the packing member is formed of apiston of suitable material provided with a bore and slidabl itted inthe cylindrical portionof the nozz e which is provided with an apertureclosure cover at its front end, the bore of the piston in axialalignment with the aperture in the cover, but being of smaller diameterthan this, whilst l5 the diameter of the aperture in the cover is ofsmaller diameter than the head of the lubricating nipple so that it isonly capable of titting over a portion of the head of the lubricatlngnipple. The cylindrical bore in the cover is enlarged outwardly in theform of a funnel so that the lubricating gun or pump can be applied tothe lubricating nipple at various anglesl and separate connectingmembers with connecting hose or other auxiliary means are not necessary.i

' In the actuation of the lubricating gun or pump the lubricant which isunder high pressure acts iirstly upon the piston which slides tightly inthe nozzle cylinder and forces this against the head of the nipple withwhich it forms a. tight joint at any angle of applying the lubricatinggun or pump, to the nipple. When the packing piston is forced forwardlythe nozzle with its cover, closing the cylinder,

is slightly withdrawn from the head of the lubricating nipple, withwhich it first en.

gaged, so that only the inner edge of the bore 1n the piston comes tobear upon the rounded head of the lubricating nipple and forms a jointtherewith.

The new nozzle is simple in construction' and production and iseilicient in operation. Its packing piston is protected from externalinfluences and injury and is conveniently exchangeable by beingunscrewed from the gun to which it is'screw-threadedly secured.

In the accompanying drawings is illustrated in longitudinal section oneexample of construction according to the invention.

Figure 1 shows the position of the packing piston in the nozzle when theylubricating gun or pump is not in operation, and

Figure 2 shows the nozzle when the lubricating gun or pump is in theoperative positilon in combination with a lubricating nipl5 p e. I f

a is the front portioniof a lubricating gun Y or pump Z) is thenozzle',which is screwed or otherwise fitted into it, the passage c ofthe nozzle being connected by a conical enlargeo0 ment c1 with acylindercl which at the front is closed-by a cover f provided with a centralopening e. This cover is held in position by rolling overl` or upsettingthe outer rim of the nozzle, but may be secured in position by beingscrewed into the nozzle.- The central opening of thecover'is firstcylindrical, and is then enlarged towards the outside in the form of afunnel.

Within the vcylindrical portion d of the nozzle there is mountedtightly, but capable of sliding a packing piston g of suitable materialsuch as leather, this piston being also provided with a central bore hwhich however is of somewhat smaller diameter than'l the bore e in thecover f so that the annular provided in a well known manner with anautomatic non-return valve.

Y The cylindrical portion of the bore ein the cylinder cover f is'ofsmaller diameter than B5 the spherical head of the lubricating nipplesothat the head can only partly enter the bore e.

For the purpose of lubrication the lubricating gun or pump isplaced'with its nozzle 90 against the rounded head of the nipple. Theinner edge of the cylindrical portion of the bore e comes intoengagement with the outer surface of the rounded nipple head.

The lubricating gun or pump may be applied to the ni ple at variousangles.

As soon as t e pump is operated and the lubricant under high pressurepasses through the passage c, c1 into the cylinder d it forces thepacking piston 'g outwardly and presses it 190 tightly against thenipple head, whilst the out-er edge or the outer portion of the bore la,serves to produce a tight joint whilst there is only a slight yieldingof the nozzle. The inner edge of the cylindrical portion of the bore eis thus again withdrawn from the head of the nipple (Figure 2). Thejoint which is obtained is entirely efiicient. Wear of the packingsurfaces is only very slight as they are not exposed and the packingpiston itself can be conveniently exchanged in a simple manner andreplaced by another.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I 'claim is:

1. A nozzle for hand lubricating guns hav-y ing a passageway therein, asealing member in the form of a round gasket slidably mounted in anenlarged portion of said outlet passage, a'lixed closure member in saidnozzle said sealing member adapted under lubricant pressure to be movedagainst the lubricant receiving fitting to form,A a lubricant tightseal.

2. A nozzle for ay hand lubricating gun having a passageway therein withanl enlarged Aopening near its end, a seal washer reciprocably mountedin said enlarged opening, a metallic retaining ring overlying the edgeof said sealing Washer and said retainer having an opening therethroughadapted to contact a spherically headed lubricant fitting and saidsealing washer adapted under lubricantpressure to make. a lubricant sealwith the head of said lubricant fitting.

3. A nozzle for a hand lubricating gun having an enlarged outletpassageway, a packing member located therein for cooperating with therounded head of a lubricant nipple provided with a non-return valve,said packing member formed as a leather piston and having a centralaxial bore therethrough, said packing member slidabl fitted in acylindrical portion of the out et passageway, and a fixed aperturedclosure cover at the front end of said passageway, said packing memberand said closure cover having progressively increasing aperture sizes,and the aperture in the cover formed first cylindrically and thenenlarged outwardly in the shape of a funnel.

4. A nozzle for a hand lubricating; gun having an enlarged outletpassageway, a

l packing member located therein for cooper ating with the rounded headof a lubricant nipple provided with a non-return valve, said packingmember formed as a leather pist-on and having a central axial boretherethrough, Said packing member slidably fitted in a cylindricalAportion of the outlet passageway, and a fixed apertured closure cover atthe front end of said passageway, said packing ture.

HANS KREIDEL.

